Version 1

[yaffs-website] / node_modules / grunt-legacy-util / node_modules / lodash / isError.js

diff --git a/node_modules/grunt-legacy-util/node_modules/lodash/isError.js b/node_modules/grunt-legacy-util/node_modules/lodash/isError.js
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+var isObjectLike = require('./isObjectLike');
+
+/** `Object#toString` result references. */
+var errorTag = '[object Error]';
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/**
+ * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/**
+ * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
+ * `SyntaxError`, `TypeError`, or `URIError` object.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
+ * @example
+ *
+ * _.isError(new Error);
+ * // => true
+ *
+ * _.isError(Error);
+ * // => false
+ */
+function isError(value) {
+  return isObjectLike(value) &&
+    typeof value.message == 'string' && objectToString.call(value) == errorTag;
+}
+
+module.exports = isError;